VLT® Serie 2800 and VLT® Serie 6000 Modbus RTU
Parameter
Handling
å Process Data
Process Data is illustrated as coils in Modbus RTU.
å Status Coil Maps
(128 coils total)
Note: The coil number shown in the following table
must be transmitted as ("shown value-1") in MODBUS
telegrams (e.g. Coil number 0:00001 is transmitted
as address 0000 in the MODBUS telegram).
Coil
Number
Description
1-16 PCD
1
Control Word (master → slave)
17-32 PCD
2
Reference Value (master →
slave)
33-48 PCD
1
Status Word (slave → master)
49-64 PCD
2
Given output frequency (slave
→ master)
65 Write parameters to eeprom (1 = true
/0=false)
66-128 Reserved
å Control Word Bit Descriptions for VLT 2800
The control word is used to send commands from a
master (e.g. a PC) to a slave (frequency converter).
Bit Bit = 0 Bit =1
00 Preset ref. lsb
01 Preset ref. msb
02 DC braking
03 Coasting stop
04 Quick stop
05 Freeze outp. freq.
06 Ramp stop Start
07 Reset
08 Jog
09 Ramp 1 Ramp 2
10 Data not valid Data valid
11 No function Relay 01 activated
12 No function Digital output
Terminal 46
activated
13 Select Setup, lsb
14 Select Setup, msb
15 Reversing
Bit 00/01:
Bit 00/01 is used to select between the two
pre-programmed references (parameters 215-218
Preset reference) according to the following table:
Preset ref. Parameter Bit 01 Bit 00
121500
221601
321710
421811
NOTE
In parameter 508 Select ion of preset
reference a selection is made to define how
Bit 00/01 gates with the corresponding
function on the digital inputs.
B
it 02, DC brake:
Bit 02 = ’0’ causes DC braking and stop. Brake
voltage and duration are preset in parameters
132 DC brake voltage and parameter 126 DC
braking time. Note: In parameter 504 DC brake a
selection is made to define how Bit 02 gates with the
corresponding function on a digital input.
MG.10.S1.22 - VLT is a registered Danfoss trademark
19
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